Instagram has blown up as one of the most popular iOS apps on the App Store, allowing users to simply share moments in their life through photos.

Tonight, the Instagram app has been updated to version 2.1, which has added three new features…

Lux: a new way to enhance your photos

Simplified and improved design

New filter: Sierra

Instagram 2.1′s coolest new feature is Lux. Lux is a new way to enhance your photos, and can be done by simply clicking the image. The Next Web shows off the enhancements lux adds above.

The app has also been updated with a new and simplified UI. The new UI is noticeably quicker, less cluttered, and also features a new notification system. Instagram’s new designer Tim Van Damme, who was hired in December, is responsible for most of the UI enhancements. Lastly, Instagram has added a new filter called Sierra — which has a 70s look to it.